AgWeatherNet Weekly Weather Outlook for July 12 to July 18, 2014

Major Heat Wave Through At Least the Middle of Next Week

Nic Loyd, Meteorologist, 509-786-9357
Gerrit Hoogenboom, Director, 509-786-9371

The weather for the next 7 days can be summarized in two words: very hot. Most areas east of the Cascades will be above 100 degrees for much of the period, while the hottest areas could reach 110 degrees at some point. Unfortunately, the prolonged hot spell will also feature unusually humid conditions by Northwest standards, which means that there will be limited relief at night.

There are, however, two wildcards that may provide some variability to an otherwise hot, sunny, and calm week. The first item of interest centers around the potential for convective clouds, and perhaps even an isolated thundershower, anytime through about Monday. Although the extent and timing of cloud cover remains uncertain, any areas that experience clouds could be less hot during the day, but even muggier at night. The second issue involves the volatile coastal weather during heat waves. Despite the expectation of an oppressive air mass, the coast can be cooled by sea breezes. Right now, the timing and strength of any such cooling winds is not clear. In general, the coast is expected to experience some heat at times. It is also likely that there will be large gradients in time and space near the beaches, such that changeable temperatures should be anticipated in the coming days.

Some moderation of temperatures should finally arrive from west to east later next week or by next weekend at the latest.

Temperatures
  • Very hot statewide through most of the period, except slightly cooler at times at the coast.
  • Cooler, especially in the west, later next week.

Precipitation
  • A chance of isolated, mainly mountain thundershowers through Monday.
  • Mainly dry statewide through the period.

Wind
  • Mainly light through the period, except windy around thunderstorms.
  • Possibly increasing later next week.

8 to 14 Day Outlook - July 19 to 25
  • Overall, above average temperatures and below average precipitation are expected during the 8 to 14 day time frame.

Important Points about Next Week's Weather

South Central Washington
  • Normal conditions for this time of the year would be highs in the upper 80s to around 90 and lows in the mid 50s to around 60.
Weekend
  • Mostly dry.
  • Highs in the upper 90s to mid 100s on Saturday, and low to mid 100s on Sunday.
  • Lows in the 60s to around 70 on Saturday morning, and 60s to mid 70s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the mid to upper 100s.
  • Lows in the upper 60s to 70s.

North Central Washington
  • Normal conditions for this time of the year would be highs in the mid to upper 80s and lows in the upper 50s.
Weekend
  • Mostly dry.
  • Highs in the upper 90s to mid 100s on Saturday, and low to mid 100s on Sunday.
  • Lows in the 60s to around 70 on Saturday morning, and 60s to mid 70s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the 100s.
  • Lows in the upper 60s to 70s.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the mid 80s and lows in the low to mid 50s.
Weekend
  • Mostly dry.
  • Highs in the 90s on Saturday, and mid 90s to low 100s on Sunday.
  • Lows in the mid 50s to mid 60s on Saturday morning, and upper 50s to 60s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the mid 90s to mid 100s.
  • Lows in the 60s to low 70s.

Western Washington
  • Normal conditions for this time of the year would be highs in the mid to upper 70s, except upper 60s at the coast, and lows in the 50s.
Weekend
  • Mostly dry.
  • Highs in the 80s to 90s on Saturday, and mid 80s to 90s on Sunday, except cooler at the coast.
  • Lows in the mid 50s to mid 60s on Saturday morning, and upper 50s to mid 60s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the upper 80s to 90s early, except cooler at the coast.
  • Becoming cooler later in the week.
  • Lows in the upper 50s to 60s early, and then cooler later in the week.
Washington State University